The mileage is 27.6 mi/gal
Miles driven = 552.4 mi
Calculate gallons used.

Answer: 20.015 gallons (approximately 20 gallons)
3,500 m so 3 km and 500 m
2 to the power of 14 means 2^14.
That would be 16384.
After graphing both lines, we're able to tell the solution by looking at the point where the lines cross. In this case, it's at (4, -1). And so that is the solution set.